Unitary hot sprue bushing



FIG. 1 is a side elevational view of a unitary hot sprue bushing showing my new design;

FIG. 2 is a view of the unitary hot sprue bushing illustrated in FIG. 1 with the unitary hot sprue bushing rotated about its horizontal axis 180 degrees;

FIG. 3 is an end view thereof taken from the left of FIG. 1;

FIG. 4 is an end view thereof taken from the right of FIG. 1; and,

FIG. 5 has been drawn on an enlarged scale with respect to FIGS. 1-4. 

The ornamental design for a unitary hot sprue bushing, as shown and described. 